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Placideidae
Taxonomy
Placideidae was named by Schneider (1956). Its type is Placidea.
It was assigned to Kirkbyacea by Benson et al. (1961); and to Kirkbyoidea by Crasquin-Soleau (1997).
It was assigned to Kirkbyacea by Benson et al. (1961); and to Kirkbyoidea by Crasquin-Soleau (1997).
Subtaxa
Amphissella, Placidea (type genus)
Synonymy list
| Year | Name and author |
|---|---|
| 1956 | Placideidae Schneider p. 95 |
| 1961 | Placideidae Benson et al. p. Q168 |
| 1997 | Placideidae Crasquin-Soleau p. 54 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Fm. †Placideidae Schneider 1956
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G. †Amphissella Stover 1956
G. †Placidea Schneider 1956
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†Placidea lutkevichi Spitzharsky 1939
†Placidea petschorensis Schneider 1966
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Alvarez et al. 2008 | |||||
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Silurian | USA (Oklahoma) | Amphisella sp. (528) | |
| Givetian | USA (New York) | Amphissella papillosa (94047 94048) | |
| Sakmarian | Canada (British Columbia) | Placidea lutkevichi (106669) | |
| Wordian | Oman | Placidea petschorensis (49917) | |
| Wordian | Russian Federation | Placidea lutkevichi (132367) | |
| Late/Upper Severodvinian - Vyatkian | Russian Federation (Vologda) | Placidea lutkevichi (187939) |